Borussia Dortmund boss Jurgen Klopp was full of praise for former club Mainz and coach Thomas Tuchel ahead of their Bundesliga clash.
Klopp spent seven years in charge of Saturday's opponent before leaving for Die Schwarzgelben in 2008, and a win at Signal Iduna Park on Saturday would mark a sixth consecutive victory over his former employers.
The 46-year-old trainer - who also played for Mainz for 12 years between 1989 and 2001 - sung the praises of his old side and Tuchel, who has been in the Coface Arena hot seat since August 2009.
"They are an established Bundesliga team now and I'm delighted for them," Klopp said. "They are in very good shape, and Thomas could train any club in the world."
Dortmund would assure itself of an automatic spot in next season's Champions League with a fourth straight Bundesliga victory this weekend and heads into the game in high spirits.
Klopp's men destroyed already-crowned champion Bayern Munich 3-0 at the Allianz Arena in the club's last league outing, and followed that up with a 2-0 win over Wolfsburg in Tuesday's DFB-Pokal semifinal.
After the disappointment of exiting this season's Champions League in the last eight, a strong finish to what, at times, has been a difficult league campaign would set Dortmund up perfectly for the cup final against Bayern on May 17.
Mainz, meanwhile, has clear goals of its own to chase, with Tuchel's team still harboring hopes of a top-four finish.
The club currently sits seventh, four points adrift of fourth-placed Bayer Leverkusen, but has been inconsistent in recent weeks, losing three of its last five Bundesliga matches.
A spot in the Europa League looks well within the club's reach, though, as the team is just two points behind Borussia Monchengladbach in sixth with a trip to face Lucien Favre's men still to come next month.
In November's reverse fixture, Robert Lewandowski scored twice in a 3-1 win for Dortmund and Mainz will have to find a better way to cope with the Bundesliga's joint-top scorer on Saturday.
Klopp revealed on Thursday that Dortmund goalkeeper Roman Weidenfeller will miss out with a groin injury, with Mitchell Langerak set to deputize, while the coach also confirmed club captain Sebastian Kehl is doubtful with a knock.
For the visiting team, long-term absentees Julian Baumgartlinger (knee) and Dani Schahin (groin) have returned to training, but this weekend will come too soon for the pair.
Follow GOAL.COM on